[gdal-dev] using GDALCreateCopy and changing only the datatype

[Frank Warmerdam]

Yann Chemin wrote:
> Hello,
> 
> I would like to use GDALCreateCopy and change the datatype from int32
> to float32.
> 
>         GDALDatasetH hDatasetOut0;
>         hDatasetOut0 = GDALCreateCopy( hDriver1, ndviF,
>                                 hDataset1,FALSE,NULL,NULL,NULL);
>         GDALRasterBandH hBandOut0;
>         hBandOut0 = GDALGetRasterBand(hDatasetOut0,1);

Yann,

Generally speaking to do this with CreateCopy() you would need to create
an intermediate virtual dataset with the altered pixel data type.  This is
how the -ot flag of gdal_translate works.   You can review the
gdal_translate.cpp code as an example, though it is somewhat involved.

Best regards,
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